The genes responsible for some of the traits that Mendel observed have been recently identified and have helped in determining how molecular variation produces morphologic variation in pea plants
Allelic variation in the Sbe1 gene, which produces starch-branching enzyme 1, is responsible for which trait in peas? A) round and wrinkled pea shape
B) yellow and green pea color
C) purple and white flowers
D) tall and short plant height
E) axial and terminal flower position
A
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DNA fingerprinting is a method used to ____
a. identify a species b. distinguish between two individuals of the same species c. examine the DNA sequences encoding for human fingerprints d. extract DNA samples from human fingerprints e. determine the sequence of the human genome
Where does binary fission begin?
a. the promoter region b. the metaphase plate c. the septum d. the origin
Based on the accompanying figure, when prey are abundant, the most effective hunting group size is:
a. 1. b. 3. c. 4. d. 5. e. 7.
Assume that a mutation occurs in the gene responsible for the production of hexosaminidase A, such that only about 50% of the enzyme activity is found in the heterozygote compared with a homozygous normal individual. If heterozygotes are phenotypically
normal, we would say that the mutant allele is ________ to its normal allele. A) epistatic B) auxotrophic C) recessive D) dominant E) gain of function